<template>
    <div>
        <!-- 面包屑区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片区域 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolesList" stripe border>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <!-- <pre>{{scope.row.children}}</pre> -->
                        <el-row v-for="(item1,i1) in scope.row.children"
                            :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过 for 循环 嵌套渲染二级权限-->
                                <el-row v-for="(item2,i2) in item1.children" :key="item2.id"
                                    :class="[i2 === 0 ? '':'bdtop','vcenter']">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                                            {{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" closable v-for="(item3,i3) in item2.children"
                                            :key="item3.id" @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#" align="center"></el-table-column>
                <el-table-column prop="roleName" label="角色名称" align="center"></el-table-column>
                <el-table-column prop="roleDesc" label="角色描述" align="center"></el-table-column>
                <el-table-column label="操作" align="center" width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-search" size="mini"
                            @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini"
                            @click="removeUserById(scope.row.id)">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini"
                            @click="showSetRightsDialog(scope.row)">分配权限
                        </el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色的对话框区域 -->
        <el-dialog title="添加角色" :visible.sync="addDialogVisible" @close="addDialogClose" width="30%">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="formRules" ref="addFormRef" label-width="100px">
                <el-form-item label="角色名称：" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述：" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改用户的对话框区域 -->
        <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="30%">
            <!-- 内容主体区域 -->
            <el-form :model="editForm" :rules="formRules" ref="editFormRef" label-width="100px">
                <el-form-item label="角色名称：" prop="roleName">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述：" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限的对话框区域 -->
        <el-dialog title="分配权限" :visible.sync="setRightsDialogVisible" width="30%" @close="setRightsDialogClose">
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" node-key="id" ref="treeRef" show-checkbox default-expand-all
                :default-checked-keys="defKeys"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightsDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>



    </div>
</template>
<script>
export default {
    data() {
        return {
            // 所有角色列表数据
            rolesList: [],
            // 所有权限的列表数据
            rightsList: [],
            // 控制添加角色对话框的显示与隐藏
            addDialogVisible: false,
            // 控制修改角色对话框的显示与隐藏
            editDialogVisible: false,
            // 控制分配权限对话框的显示与隐藏
            setRightsDialogVisible: false,
            // 添加角色的表单数据
            addForm: {
                roleName: '',
                roleDesc: ''
            },
            // 查询到的角色信息对象
            editForm: {},
            // 表单的验证规则对象
            formRules: {
                roleName: { required: true, message: '请输入角色名称' },
                roleDesc: { required: true, message: '请输入角色描述' }
            },
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点Id值数组
            defKeys: [],
            // 当前即将分配权限的角色id
            roleId: ''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')
            if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
            this.rolesList = res.data
        },
        // 添加角色
        async addRole() {
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) return
                // 发起添加角色的网络请求
                const { data: res } = await this.$http.post('roles', this.addForm)
                if (res.meta.status !== 201) return this.$message.error('添加角色失败！')
                this.$message.success('添加角色成功！')
                // 隐藏添加角色的对话框
                this.addDialogVisible = false
                // 重新获取角色列表
                this.getRolesList()
            })
        },
        // 监听添加角色对话框的关闭事件
        addDialogClose() {
            this.$refs.addFormRef.resetFields()
        },
        // 展示编辑角色的对话框
        async showEditDialog(id) {
            this.editDialogVisible = true
            const { data: res } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) return this.$message.error('查询角色信息失败！')
            this.editForm = res.data
        },
        // 修改角色信息并提交
        editRole() {
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) return
                // 发起修改角色信息的网络
                const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
                    roleName: this.editForm.roleName,
                    roleDesc: this.editForm.roleDesc
                })
                console.log(this.editForm.roleId);
                if (res.meta.status !== 200) return this.$message.error('更新角色信息失败！')
                // 关闭对话框
                this.editDialogVisible = false
                // 刷新数据列表
                this.getRolesList()
                // 提示修改成功
                this.$message.success('更新角色信息成功！')
            })
        },
        // 根据id删除对应的角色信息
        async removeUserById(id) {
            // 弹框询问用户是否删除数据
            const confirmResult = await this.$confirm('此操作将永久删除该角色信息, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            // 如果用户确认删除，则返回值为字符串confirm
            // 如果用户取消删除，则返回字符串cancel
            // console.log(confirmResult);
            if (confirmResult !== 'confirm') return this.$message.info('已取消删除')
            // 请求删除数据
            const { data: res } = await this.$http.delete('roles/' + id)
            console.log(id);
            if (res.meta.status !== 200) return this.$message('删除角色失败！')
            this.getRolesList()
            return this.$message.success('删除成功！')
        },
        // 根据id删除对应的权限
        async removeRightById(role, rightId) {
            // 弹框提示用户是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            console.log(confirmResult);
            if (confirmResult !== 'confirm') return this.$message.info('已取消删除')
            // 删除权限的网络请求
            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            console.log(res.data);
            if (res.meta.status !== 200) return this.$message.error('删除权限失败！')
            // 为权限列表重新赋值 
            role.children = res.data
            return this.$message.success('删除权限成功！')
        },
        // 展示分配权限的对话框
        async showSetRightsDialog(role) {
            this.roleId = role.id
            // 递归获取三级节点的Id
            this.getLeafKeys(role, this.defKeys)
            this.setRightsDialogVisible = true
            // 获取所有权限的数据
            const { data: res } = await this.$http.get('rights/tree')
            if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')
            // 把获取到的权限数据保存到rightsList中
            this.rightsList = res.data
            console.log(this.rightsList);

        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
        getLeafKeys(node, arr) {
            // 如果当前 node 节点不包含 children 属性，则是三级节点
            if (!node.children) return arr.push(node.id)

            node.children.forEach(item => {
                this.getLeafKeys(item, arr)
            });
        },
        // 监听分配权限对话框的关闭事件
        setRightsDialogClose() {
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys);
            const idStr = keys.join(',')

            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
            if (res.meta.status != 200) return this.$message.error('分配权限失败！')
            this.getRolesList()
            this.setRightsDialogVisible = false
            return this.$message.success('分配权限成功！')
        }
    }
}
</script>
<style lang="less" scoped>
.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: 1px solid #eee;
}

.bdbottom {
    border-bottom: 1px solid #eee;
    margin: 0px 60px;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>